Region 8 is where I'm getting all my birds but I RARELY see grouse in the areas I see and shoot my deer. I will see the odd deer in my grouse spots but they would probably be unshootable ,,,,unless they were standing on the road because it's so thick and bushy. If they moved 10' off the road you wouldn't likely have an ethical shot because they'd be in the thick of things.
That's the kind of habitat that grouse like in Region 8. You don't see them along clear cuts or other open forested areas. The skinnier and less used a FSR is used the better your chance of seeing grouse is my experience.
Sure helps to have a dog that can retrieve them out of the real tough spots:
https://imgur.com/g0OQB3y